/**
 * @author Laurie
 */
public class Test {
    public static void main(String[] args) {
        MyStack<String> myStack = new MyStack<>();
        myStack.push("你好");
        myStack.push("世界");
        myStack.push("!");
        System.out.println(myStack.back());
        System.out.println(myStack.pop());
        System.out.println(myStack.back());
    }

}
